Axial Lead & Cartridge Fuses
PICO® ll > Very Fast-Acting > 491 Series
Product Characteristics
Encapsulated, Epoxy-Coated
Body: PureTin-coated Copper wire leads
Operating Temperature –55ºC to +125ºC
Materials
MIL-STD-202, Method 213, Test
Condition I (100 G’s peak for 6
milliseconds)
Solderability
Lead Pull Force
MIL-STD-202, Method 208
Shock
MIL-STD-202, Method 211, Test Condition
A (will withstand a 7lbs. axial pull test)
MIL-STD-202, Method 201 (10–55
Hz); Method 204, Test Condition C
(55–2000 Hz at 10 G’s Peak)
Vibration
Moisture Resistance
MIL-STD-202, Method 106
Withstands 60 seconds above 200OC
and up to 260ºC, maximum
Resistance to Soldering
Heat
Flammability Rating
UL 94V–0
Part Numbering System
Dimensions
0491 xxxx N R T1 HF
491 Series (RoHS Version) Markings
(T1 lead length)
62.7 (2.468")
Series
52.4 (2.062")*
27.78
27.78
Current Rating
(1.094")
(1.094")
7.11 (.280")
Refer to Amp Code column of
Electrical Characteristics Table
F
0.5
0.5
L
2.80 (.11")
MAX
Quantity
N = 5000
M = 1000
5.0 (.197")
6.35 (.25")
tape
6.35 (.25")
tape
F
L
Wire Diameter:
0.64 (.025")
Type of Packaging
R = Reel
A = Ammo Pack
491 Series (RoHS and Halogen-free Version) Markings
(T1 lead length)
Lead Length
62.7 (2.468")
The default lead length for Ammo pack and
Loose pack is now T1
T1 = 52.4mm (2.062”)
52.4 (2.062")*
27.78
(1.094")
27.78
(1.094")
7.11 (.280")
F
0.5
0.5
L
Option Codes
Blank = RoHS
2.80 (.11")
MAX
5.0 (.197")
6.35 (.25")
tape
6.35 (.25")
tape
HF
= RoHS and Halogen-free
F
L
Wire Diameter:
0.64 (.025")
Packaging
Quantity &
Packaging Code
Packaging Option
Packaging Specification
Please refer to available quantities
above in "Part Numbering System”
*T1: 52.4mm (2.062")Tape and Reel
EIA 296
Notes:
* T1 dimension is defined as the length of the component between the two tapes. The full component length is 62.7mm (2.468").
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/26/13